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Small business startup cost calculator

Estimate startup capital, operating cash buffer, funding shortfall, and payback from recurring profit.

  • USD inputs · transparent calculation assumptions
  • Instant updates as inputs change
  • Data is calculated in this browser only
USD inputs · transparent calculation assumptions
Your scenario
Updates as you type
Estimated startup capital required$47,100.00
One-time costs including contingency
$23,100.00
Monthly operating costs
$8,000.00
Operating cash buffer
$24,000.00
Funding shortfall
$17,100.00
Monthly operating profit
$2,000.00
Annual operating profit
$24,000.00
One-time cost payback
12 months
Calculation notes

Understand the Small business startup cost calculator

Capital required = (equipment + inventory + licenses) × (1 + contingency rate) + monthly operating cost × buffer months. Payback = one-time startup cost / positive monthly operating profit, rounded up. The calculation runs locally and keeps cash-flow timing consistent with the stated assumptions.

Formula and logic

How do I estimate business startup capital and an operating cash buffer?

Capital required = (equipment + inventory + licenses) × (1 + contingency rate) + monthly operating cost × buffer months. Payback = one-time startup cost / positive monthly operating profit, rounded up.

Worked example

How much capital covers $21,000 startup costs and three months at $8,000?

Equipment $15,000, inventory $5,000 and licenses $1,000 total $21,000. A 10% contingency makes $23,100; three months of $8,000 operating expenses brings capital required to $47,100.

How to read the result

Is a startup cash buffer the same as a recurring operating expense?

  • A cash buffer is funding reserved for operations, not an additional monthly expense.
  • Payback uses operating profit before income tax and ignores financing costs.
Limits and assumptions

Does startup payback include taxes and financing costs?

  • Fill in all relevant local costs yourself. Revenue ramp-up, working-capital timing, taxes, debt financing, depreciation and unexpected cost overruns are not modeled.

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